.news_nav{
    margin: 52px auto 66px auto;
    width: 668px;
    height: 35px;
    font-size: 16px;
    background-color: #fafafa;
    line-height: 35px;
}
.news_nav a{
    float: left;
    width: 334px;
    height: 42px;
    text-align: center;   
}
.news_nav a:hover{
    background: url(../images/tabbg.png) no-repeat;
}
.main ul{
    overflow: hidden;
}
.main ul li{
    float: left;
    margin: 0 10px 35px;
    width: 480px;
    height: 200px;
    background-color: #f2f2f2;
}
.main ul li img{
    float: left;
    margin-right: 29px;
}
.main ul li h2{
    margin: 20px 0 2px 0;
    font-size: 16px;
    font-weight: 400;
}
.main ul li span{
    font-size: 12px;
}
.main ul li p{
    padding-right: 22px;
    margin-top: 20px;
    font-size: 14px;
}
.btn{
    margin-left: 10px;
    padding-top: 0;
}